Finger-mounted electrokinetic delivery system for self-administration of medicaments and methods therefor

ABSTRACT

An electrokinetic delivery system for personal use in self-administration of a medicament to a treatment site on an individual includes a device shaped to conform with the shape of a portion of an individual&#39;s finger from a tip thereof to a location past the first finger joint. A self-contained power source is carried by the device and a first electrode is carried by the device adjacent a distal end portion thereof and the tip of the individual&#39;s finger. The first electrode is in electrical contact with the power source. A second electrode is carried by the device for contact with the individual&#39;s finger. The second electrode is in electrical contact with the power source. Upon application of the first electrode over a treatment site with the medicament disposed between the first electrode and the treatment site and completion of an electrical circuit through the individual&#39;s body and said electrode, the device applies current for electrokinetically driving the medicament into the treatment site.

RELATED APPLICATIONS

[0001] This application is a continuation-in-part of application Ser.No. 09/584,138, filed May 31, 2000 and application Ser. No. 09/523,217,filed Mar. 10, 2000, the disclosures of which are incorporated herein byreference.

BACKGROUND OF THE INVENTION

[0002] The present invention relates generally to the electrokineticmass transfer of substances into and/or extracting substances fromtissue and particularly to apparatus and methods for extracting, e.g.,body fluids and/or harmful substances from a site, and/or deliveringsubstances, e.g., a medicament to a treatment site.

[0003] Electrokinetic delivery of medicaments for applying medicationlocally through an individual's skin is known. One type ofelectrokinetic delivery mechanism is iontophoresis, i.e., theapplication of an electric field to the skin to enhance the skin'spermeability and to deliver various ionic agents, e.g., ions of solublesalts or other drugs. In certain situations, iontophoretic transdermalor transmucocutaneous delivery techniques have obviated the need forhypodermic injection for many medicaments, thereby eliminating theconcomitant problem of trauma, pain and risk of infection to theindividual. Other types of electrokinetic delivery mechanisms includeelectroosmosis, electroporation, electromigration, electrophoresis andendosmose, any or all of which are generally known as electrotransport,electromolecular transport or iontophoretic methods. The electrokineticdelivery mechanism may also be accompanied by ultrasonic vibration tofurther facilitate electrokinetic transport of the substance, e.g., byopening pathways in the skin. Ultrasound may be employed in a number ofways such as (i) traditional piezoelectric elements, (ii)magnetostrictive alloys, (iii) Application Specific Integrated Circuits(ASICS) with an ultrasound transmitter built in or (iv) by thin foilsheets with incorporated piezoelectric dipole elements. See, forexample, U.S. patent application Ser. No. 09/205,751, filed Dec. 4,1998, of common assignee herewith, the disclosure of which isincorporated herein by reference.

[0004] There are several difficulties with electrokinetic delivery ofsubstances such as medicaments. One is the heretofore need for somewhatcumbersome, bulky and costly equipment which oftentimes requires thepresence of an individual at a doctor's office or treatment center anduse of medical professionals to administer the medicament. Private,self-administration of medicaments or for diagnostic application by theindividual at non-medical or non-professional facilities is highlydesirable. Also, an easily transportable apparatus for electrokineticdelivery of medication, for example, a lightweight, compact portabledevice useful with an applicator packaged as a single or unit dosageapplicator, and which may be readily and easily manipulated to contactthe treatment site appears ideal as a patient/consumer friendlyself-administration system appropriate for many circumstances.

BRIEF DESCRIPTION OF THE INVENTION

[0005] In accordance with a preferred embodiment of the presentinvention, there is provided a portable, self-contained, digit-mounted,lightweight, compact and wireless electrokinetic device or medicator fordelivering a substance, e.g., a medicament, for self-administration to atreatment site. By the term substance is meant a medicament as well asnatural or homeopathic products that may be outside the definition ofmedicament, e.g., inks and pigments for tattoos, and more generallyincludes any substance capable of electrokinetic transport through skinor mucocutaneous membrane, e.g., into a treatment site or from a site,e.g., for diagnostic purposes. The majority of applications using thepresent invention are for applying medicaments to treatment sites andtherefore the terms medicament and substance are used interchangeably,each embracing the other, the term medicament being used in lieu of theterm substance throughout this specification for convenience. Bymedicament is meant any chemical or biologic substance that may be usedon or administered to humans or animals as an aid in the diagnosis,treatment or prevention of disease or other abnormal or cosmeticcondition or for the relief of pain or to control, diagnose, measure,detoxify or improve any physiologic or pathologic condition. By atreatment site is meant a target tissue, e.g., a diseased tissue, ordiagnostic/detoxification site for extraction of a substance, underlyingor exposed through or on an individual's skin, cutaneous ormucocutaneous membrane.

[0006] In a first aspect of the present invention, an individual mayprivately self-administer the medicament by employing the self-poweredwireless finger-mounted device hereof to electrokinetically drive themedicament into the treatment site, e.g., through the skin ormucocutaneous membrane to a diseased tissue. Preferably, a low-costdigit-mounted device is used to facilitate the flow of medicament intothe skin under the influence of the electromotive force supplied to themedicament by the self-powered digit-mounted wireless device. The deviceis preferably lightweight, compact, inexpensive and portable andcomprises a device body or splint configured for mounting on anindividual's extremity for self-manipulation and containing a powersource, for example, a battery, connected directly or indirectly tofirst and second terminals and suitable electronics controlling andinterfacing with active and counter electrodes. The device is preferablymounted on the individual's finger to facilitate manipulation of thedevice so that the active electrode connected to the first terminal maybe located against the skin or mucocutaneous membrane, i.e., thetreatment site. The second terminal of the power source is coupled withthe counter electrode, i.e., a tactile electrode, on the surface of thedevice for electrical contact with a second skin site, e.g., a portionof the individual's finger engaged by the device. The polarity of theactive and counter electrodes may be reversed by either a mechanicalswitch, a relay or solid-state implementation as the application maydictate. By self-manipulation is meant that the individual can mount thedevice on a finger of one hand or a portion thereof and substantiallyfreely orient the device to engage the active electrode of the devicethrough a substrate containing medicament or a conductive carriertherefor, or directly through medicament interposed between the skin ormucocutaneous membrane and the active electrode, generally wherever thetreatment site is located and irrespective of whether a substrate isused and, if used, irrespective of whether the substrate is attached tothe device or to the individual's skin or mucocutaneous membrane orinterposed therebetween with the device subsequently applied to thesubstrate.

[0007] In a preferred embodiment of the present electrokineticmedicament delivery device, there is provided a substrate having an opencellular structure, for containing the medicament. This preferred opencellular or porous substrate forms a minimum barrier to movement ofmedicament molecules under the influence of the applied current toelectrokinetically transport the medicament molecules into the skin ormucocutaneous membrane. The substrate is preferably pre-filled with asingle or unit dose of medicament and pre-packaged with or in anapplicator portion of the device prior to application of the device andthe attached substrate to the treatment site. It will be appreciated,however, that the substrate can be applied directly to the treatmentsite or form a substrate interposed between the device, i.e., the activeelectrode and the treatment site without attachment to the device. Forthose medicaments which are not per se iontophoretically transportable,the medicament and/or the substrate may be hydrated prior to use orcontain a hydrating substance, e.g., water, in prepackaged formcontaining both the medicament and hydration substance. The hydrationsubstance may contain salts or other ionizable ingredients and istherefore conductive to facilitate electrokinetic transport.

[0008] It will be appreciated that upon application of the substrate tothe treatment site with the medicament interposed between the activeelectrode and treatment site, an electrical circuit is completed throughthe active electrode of the device, the medicament or hydratedmedicament in the substrate and the treatment site for return throughthe individual's skin in electrical contact with the counter electrodeof the device. Thus, with the device carried, for example, by theindividual's finger in contact with the counter electrode carried by thedevice, an electrical circuit is completed from the device through theactive electrode, the medicament or hydrated medicament, the treatmentsite, the individual's torso, arm, hand and the tactile electrode. Tofacilitate completion of the electrical circuit, either or bothelectrodes may contain or have an overlying layer of an electricallyconductive material, for example, hydrogel.

[0009] In a preferred embodiment of the present invention, theelectrokinetic device is provided in the form of an electrokineticfinger splint medicator, which may be either disposable or reusable orhave multiple parts with one part disposable and another part reusable.Preferably, the medicator is releasably secured to the finger of anindividual and is preferably provided in two parts: a distal portionmounting an applicator head and a proximal portion mounting a housingfor electronics and a power source. The two parts are preferablyreleasably secured to one another at the time of use. The proximal partcontains, inter alia, a power source, various electronics for providingthe appropriate electrical current necessary to electrokinetically drivethe medicament into the treatment site, finger-mounting securingelements, and electrical contacts. In the preferred embodiment, theproximal part is preferably reusable and may be in either a durablelong-term use format or of a more limited time and/or number of usesformat, e.g., one year and/or some pre-set, limited number of uses,e.g., five uses, before becoming inoperable, referred to herein as areposable portion. However it will also be appreciated that the proximalportion may be non-reusable and disposable after only one use. Thedistal portion preferably carries the active electrode at a locationalong the outermost end portion of the distal portion and facingoutwardly thereof. The substrate containing medicament lies in contactwith the active electrode and its opposite planar surface extends at anoblique angle from the underside of the distal portion to facilitateengagement with the treatment site. The counter electrode preferablyextends along an inside surface of the distal portion, i.e., oppositethe fingerprint portion of the individual's finger respectively.Alternatively or conjunctively, the counter electrode may be locatedalong the underside of the proximal portion. In either case, the counterelectrode electrically connects the power source and the individual'sfinger. When the proximal and distal portions of the medicator aresecured to one another, electrical contacts on the proximal and distalportions are electrically connected with one another thus placing theactive electrode on the distal portion in electrical contact with thepower source and electronics contained in the proximal portion. Thecounter electrode is also electrically connected with the power sourceupon securing the distal and proximal portions to one another.Alternatively, an on/off switch may be provided in the electricalcircuit whereby, upon securing the distal and proximal portions to oneanother, the on/off switch may be subsequently switched from the offposition to the on position to activate the circuit.

[0010] The power source and electronics are preferably carried by andalong outermost portions of the proximal portion. The proximal portionis shaped and configured to lie along the finger preferably just forwardof the individual's knuckle joint and may extend further back along theback side of the hand. One or more elements for securing the proximalportion to the individual's finger are provided. For example, strapshaving hook-and-loop fasteners (Velcro®) are preferably provided tosecure the medicator proximally to the individual's fingertip.Alternately, as a further example a soft malleable metal arm or arms maybe employed to secure the device to the digit. When the distal andproximal portions are secured to one another, the tip of theindividual's finger preferably overlies the counter electrode oppositethe active electrode.

[0011] Preferably, the distal portion has a ring-like or annularconfiguration for receiving the tip of the individual's finger, theactive electrode being housed in an applicator head underlying andelectrically insulated from the fingertip or fingerprint portion of theindividual's finger. Thus, the active electrode is located in a supportor housing carried by the distal portion and has an exposed surface forelectrical contact in a separate substrate with (i) a medicamentdisposed in a porous substrate within or attached to the housing, (ii)medicament in a substrate interposed between the active electrode andthe treatment site or (iii) with the medicament per se. With themedicament disposed in a substrate, e.g., a porous pad, applied, fittedor urged into electrical contact with the active electrode or with themedicament applied directly on the active electrode or the treatmentsite, it will be appreciated that the active electrode of the fingersplint medicator can be readily and easily manipulated to engage themedicament, and hydration material if necessary, or substrate carryingthe medicament interposed between the active electrode on the medicatoragainst the treatment site.

[0012] In accordance with one aspect of the present invention, anelectrokinetic delivery system for personal use in self-administrationof a medicament to a treatment site on an individual includes a devicefor releasable securement to an individual's finger and shaped in partto conform to at least a portion of the individual's finger. A retainerreleasably secures the device to the individual's finger and aself-contained power source is carried by the device. First and secondelectrodes are carried by the device. The first electrode is inelectrical contact with the power source and is adjacent a distal endportion of the device and adjacent the tip of the individual's fingerupon retention of the device on the individual's finger. The secondelectrode is for electrical contact with a portion of the individual'sbody and is in electrical contact with the power source. Uponapplication of the first electrode to a treatment site with themedicament interposed between the first electrode and the treatment siteand completion of an electrical circuit through the first electrode, themedicament or conductive carrier therefor, the treatment site, theindividual's body, the second electrode and the power source, the devicecauses an electrical current to flow for electrokinetically driving themedicament into the treatment site.

[0013] In accordance with another aspect of the present invention, anelectrokinetic delivery system for personal use in self-administrationof a medicament to a treatment site on an individual includes a devicehaving a generally ring-shaped body and a through-opening for receivingand releasably retaining the device on the finger of the individual. Thedevice further includes a self-contained power source carried by thedevice, a first electrode in electrical contact with the power source,and a second electrode for electrical contact with a portion of theindividual's body. The second electrode is in electrical contact withthe power source. Upon application of the first electrode to a treatmentsite with the medicament interposed between the first electrode and thetreatment site and completion of an electrical circuit through the firstelectrode, the medicament or conductive carrier therefor, the treatmentsite, the individual's body, the second electrode and the power source,the device causes an electrical current to flow for electrokineticallydriving the medicament into the treatment site.

[0014] In accordance with yet another aspect of the present invention,electrokinetic self-administration of a medicament into a treatment sitefor an individual is provided by: providing a device shaped in part toconform to at least a portion of an individual's finger and having aself-contained power source, first and second electrodes, and asubstrate in electrical contact with said first electrode and includingan electrokinetically transportable medicament and an exposed contactsurface; releasably retaining the device on the individual's finger,with the second electrode in electrical contact with the individual'sfinger; while the device remains retained on the individual's finger,placing the contact surface of said substrate into contact with theindividual's treatment site; and causing electrical current to flowthrough said first electrode, the medicament or a conductive carriertherefor, the treatment site, the individual's body, said secondelectrode and said power source to electrokinetically drive themedicament into the treatment site.

[0015] In a preferred embodiment according to the present invention,there is provided an electrokinetic delivery system for personal use inself-administration of a medicament to a treatment site on anindividual, comprising a device for releasable securement to anindividual's finger and shaped in part to conform to at least a portionof the individual's finger, a retainer for releasably securing thedevice to the individual's finger, a self-contained power source carriedby the device, a first electrode carried by the device adjacent a distalend portion thereof and adjacent the tip of the individual's finger uponretention of the device on the individual's finger, the first electrodebeing in electrical contact with the power source, a second electrodecarried by the device for electrical contact with a portion of theindividual's body, the second electrode being in electrical contact withthe power source whereby, upon application of the first electrode to atreatment site with the medicament interposed between the firstelectrode and the treatment site and completion of an electrical circuitthrough the first electrode, the medicament or conductive carriertherefor, the treatment site, the individual's body, the secondelectrode and the power source, the device causes an electrical currentto flow for electrokinetically driving the medicament into the treatmentsite.

[0016] In a further preferred embodiment according to the presentinvention, there is provided an electrokinetic delivery system forpersonal use in self-administration of a medicament to a treatment siteon an individual, comprising a device having a generally ring-shapedbody and a through-opening for receiving and releasably retaining thedevice on the finger of the individual, a self-contained power sourcecarried by the device, a first electrode carried by the device inelectrical contact with the power source, a second electrode carried bythe device for electrical contact with a portion of the individual'sbody, the second electrode being in electrical contact with the powersource whereby, upon application of the first electrode to a treatmentsite with the medicament interposed between the first electrode and thetreatment site and completion of an electrical circuit through the firstelectrode, the medicament or conductive carrier therefor, the treatmentsite, the individual's body, the second electrode and the power source,the device causes an electrical current to flow for electrokineticallydriving the medicament into the treatment site.

[0017] In a further preferred embodiment according to the presentinvention, there is provided a method of treatment by electrokineticself-administration of a medicament into a treatment site for anindividual, comprising providing a device shaped in part to conform toat least a portion of an individual's finger and having a self-containedpower source, first and second electrodes, and a substrate in electricalcontact with the first electrode and including an electrokineticallytransportable medicament and an exposed contact surface, releasablyretaining the device on the individual's finger, with the secondelectrode in electrical contact with the individual's finger, while thedevice remains retained on the individual's finger, placing the contactsurface of the substrate into contact with the individual's treatmentsite and causing electrical current to flow through the first electrode,the medicament or a conductive carrier therefor, the treatment site, theindividual's body, the second electrode and the power source toelectrokinetically drive the medicament into the treatment site.

BRIEF DESCRIPTION OF THE DRAWINGS

[0018]FIG. 1 is a schematic representation of a manner of applying anelectrokinetic delivery device according to a preferred embodiment ofthe present invention to a treatment site;

[0019]FIG. 2 is an enlarged fragmentary exploded perspective viewillustrating the device hereof;

[0020]FIG. 3 is a perspective view of a preferred embodiment of thedevice as viewed from its underside;

[0021]FIG. 4 is an elevational view of the device at a proximal endthereof;

[0022]FIG. 5 is a top plan view of the device;

[0023]FIG. 6 is a side elevational view thereof;

[0024]FIG. 7 is an exploded perspective view of a medicated cartridgeand the application head to which the cartridge is applied;

[0025]FIG. 8 is a side elevational view of a portion of an applicatorhead and substrate in accordance with another embodiment hereof;

[0026]FIGS. 9 and 10 are disassembled and assembled perspective views ofan electrokinetic delivery device according to another embodimenthereof;

[0027]FIG. 11 is a block diagram of an example electrical circuit forthe device hereof;

[0028]FIG. 12 is a schematic of an example electrical circuit for thedevice hereof;

[0029]FIG. 13 is a perspective view of a face mask electrokineticdelivery device according to a further preferred embodiment hereof;

[0030]FIG. 14 is a view similar to FIG. 13 illustrating a further formof face mask;

[0031]FIG. 15 is a side elevational view of a generally ring-shapedelectrokinetic delivery device according to a still further preferredembodiment;

[0032]FIG. 16 is a perspective view thereof;

[0033]FIGS. 17 and 18 are a bottom view and a side perspective view,respectively, of a patch applicator; and

[0034]FIGS. 19A and 19B are flow charts illustrating an exampleoperation of the device of FIG. 2.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION

[0035] Referring now to the drawing figures, particularly to FIG. 1,there is illustrated a portable, self-contained, lightweight, compact,finger-mounted, electrokinetic medicament-delivery device or medicator,generally indicated 10 applied to a treatment site on an individual. Thedevice 10 includes a housing 12 mountable to an individual's finger, forexample, by straps 14, with a tip 16 of the device 10 mounting an activeelectrode for driving, i.e., electrokinetically transporting, medicamentinterposed between the active electrode and the individual's treatmentsite into the treatment site upon completion of an electrical circuitthrough the device, the active electrode, the medicament or hydrationmaterial carrying the medicament, the individual's body and a counterelectrode, i.e., tactile electrode carried by the device. Asillustrated, the tip 16 of device 10 housing the active electrode liesadjacent to and underlies the fingerprint portion of the tip of a digit,preferably an index finger, of an individual's hand, enabling the deviceto be easily manipulated by the individual's arm, hand and finger suchthat the active electrode at the tip of device 10 may be disposed inoverlaying relation to a treatment site with the medicament ormedicament-carrying substrate interposed therebetween.

[0036] Referring to FIG. 2, the device 10 is preferably provided in twoparts: a first part or proximal portion 20 and a second part or distalportion 22. It will be appreciated that the device 10 is substantiallyrigid in construction, is preferably formed of a plastic material,although other materials may be utilized, and, while a two-part deviceis preferred, a unitary device or a device formed of more than two partsmay be provided. Additionally, while the two parts, when assembled,provide a substantially rigid device, the parts may be interconnected byflexible portions, enabling the device to flex with the flexing of theindividual's finger. As explained below, the proximal and distalportions 20 and 22 are connected together to form part of an electricalcircuit between an active electrode carried by the distal portion 22,and a power source, tactile electrode and other electronics carried bythe proximal portion 20.

[0037] The proximal portion 20 includes a compartment 24 for receiving apower source 25, e.g., a 1.5 volt silver oxide battery, as well as anelectronics pod 26 for carrying the electronics described below. Thecompartment 24 may include a removable cover 28 affording access withinthe compartment. Preferably, however, the compartment is sealed.

[0038] Proximal portion 20 is elongated and shaped and configured tooverlie a portion of an individual's finger, preferably an index finger,along opposite sides of the first finger joint, as best illustrated inFIG. 1. That is, forward and rear portions 30 and 32, respectively, ofthe proximal portion 20 are slightly angled relative to one another tostraddle the first finger joint (the joint between the first and secondphalanges of a digit) at the apex of the forward and rear portions 30and 32. Also, the proximal portion 20 has a concave surface along itsunderside, as best illustrated in FIG. 3, to comfortably overlie andsubstantially conform to the outer convex portions of the individual'sfinger on opposite sides of the first finger joint. Adjacent one sideand along a margin of proximal portion 20, there are provided a pair oflaterally projecting loops 34. Along the opposite margin of proximalportion 20, there are provided a pair of tabs 36. Straps 14 (FIG. 1) aresecured in the loops 34. The opposite ends of the straps have one ofhook-and-loop fasteners, while the outer surfaces of the tabs 36 carrythe other of hook-and-loop fasteners (Velcro®), thereby enabling thedevice 10 to be releasably secured to an individual's finger. Othermeans for releasably securing the proximal portion 20 to theindividual's finger may be provided. For example, one or more rings orsleeves may be mounted directly to the proximal portion 30 for receivingthe individual's finger. Arcuate sections may project from oppositesides of the proximal portion 30 to form one or more resilient splitrings for engaging along opposite sides of the individual's finger,their distal ends being spaced from one another along the inside surfaceof the individual's finger. Elastic straps, buckle-type fasteners, andsnap fasteners on elastic or flexible straps may also be utilized. Othertypes of releasable securements will be apparent to those of skill inthis art.

[0039] The distal portion 22 of device 10 includes a generallyfrustoconical section 40 (FIG. 2) sized and configured to receive thetip of an individual's finger, the smaller diameter end of section 40forming an opening 41 and comprising the outer end of the device. Thedistal portion 22 may include a closed annular ring as illustrated or asplit ring. However, an open-ended frustoconical section having afrustoconical interior surface is preferred because it affords greatercontrol and stability to the active electrode when the medicator ismanipulated by the individual to engage the treatment site. Also, thesmaller end 41 of the frustoconical section 40 is open to enable theindividual's fingertip, including the tip of the individual's nail, toproject from the device. It will be appreciated, however, that distalportion 22 may be extended and closed if desired. As illustrated in FIG.2, a pair of electrical contacts 42 project from the distal portion 22for engagement in mating electrical sockets 44 formed on the distal endof the proximal portion 20. Thus, when the distal and proximal portionsare secured to one another, the power source and electronics of theproximal portion are electrically connected with the active electrodeand a counter electrode 60 carried by the distal portion 22. Note alsothat the juncture of the proximal and distal portions 20 and 22,respectively, lies adjacent the second joint between the second andthird phalanges of the digit leaving the third phalange of the digit forreception within the frustoconical interior of the distal portion 22.

[0040] Referring to FIGS. 3-6, preferably a circular annular housing 50is provided along the underside of the distal portion 22 and forms partof an applicator head 51 of the distal portion 22. Housing 50 includesan active electrode 54, preferably in the form of a metal disk, mountedat the base of a circular recess 52 (FIG. 6) in housing 50. The activeelectrode 54 is in electrical contact with the power supply andelectronics in the proximal portion 20 when the portions 20 and 22 areconnected one with the other. Particularly, a spring 55 in housing 50interconnects the active electrode 54 and electrical connections 57within the distal portion 22 in electrical contact with contacts 42(FIG. 2). As illustrated in FIG. 6, a substrate 56 is disposed in therecess 52, and is preferably formed of a porous, open-cellular, inertmaterial. The substrate material may comprise a non-woven fabricmanufactured by Cerex of Pensacola, Fla., identified as Type DN, GroupDN07 & DN15. Other suitable types of materials may also be used,provided those materials, at least in the portion of the substratethrough which the medicament will be transported to the treatment site,constitute a minimum barrier to the electrokinetic transfer ofmedicament molecules from the substrate to the treatment site. Thesubstrate 56 preferably conforms to the shape of recess 52, e.g.,substantially circular, and may be frictionally maintained within thehousing and bearing against active electrode 54. Alternatively, othermeans may be provided to secure the medicament containing substrate tothe housing 50. For example, the recess 52 may include an inwardlydirected flange or lip for retaining a substrate within the recess. Apreferred embodiment for releasably securing the substrate in the recess52 in electrical contact with the active electrode 54 is described belowwith reference to FIG. 7.

[0041] It will be appreciated that the substrate 56 may be provided tothe user with or without medicament. Thus, when using the finger splintmedicator hereof, the user may apply the medicament to the substratesuch that the medicament lies within or wicks into the interstices ofthe material of the substrate. If the applied medicament is not per seconductive, the substrate may also be hydrated by the application ofwater, for example, by using an eyedropper. In the preferred form,however, a unit dose of the medicament is supplied with and prepackagedin the substrate 56. The medicament permeates the interstices of theporous substrate 56 and the substrate with the medicament is disposedwithin the recess 52 of the distal portion 22 of the device 10 andfactory-sealed. For example, as illustrated in FIG. 7, a retainer ring59 may overlie the substrate 56 and a release film, e.g., a foil lid 63having a finger pull or tab 65, may overlie the substrate 56 exposedthrough the end of the retainer ring 59. By removing the lid 63 prior touse, the medicament permeated in the substrate is exposed forelectrokinetic transport into the treatment site.

[0042] Alternatively, a unit dose of the medicament may be pre-filledand contained within a rupturable polymer reservoir or capsule withinthe substrate 56 as in U.S. Pat. No. 5,676,648, issued Oct. 14, 1997,the disclosure of which is incorporated herein by reference. Byencapsulating the medicament in a rupturable reservoir or sealing amedicament-permeated substrate, whether within device 10 or separatetherefrom, a long shelf-life is assured for medicaments. Anon-pre-filled substrate may also be provided the user with themedicament provided separately. In that instance, the user may apply thesubstrate to the distal portion 22 (if not already contained withinhousing 50) and either apply the medicament to the substrate beforeapplication of the device to the treatment site or interpose themedicament between a suitably hydrated substrate (if auxiliary hydrationis required) and the treatment site whereby electrokinetic transport ofthe medicament into the treatment site can be accomplished. To use thesubstrate with the encapsulated medicament, the capsule(s) can beopened, for example by peel-away means, such as peeling away a releasefilm, or ruptured by applying pressure to the substrate, for example, bypressing the substrate toward the active electrode 54 after thesubstrate has been located within the recess 52 of the applicator headeither upon manufacture or by the user. By rupturing the capsules, themedicament permeates the interstices of the substrate. If the medicamentrequires hydration to afford electromotive transport into the treatmentsite upon application of the electric current, the user may hydrate thepad similarly as previously described. Alternatively, an additional oneor more capsules containing hydrating or conductive material, e.g.,water or saline, and/or another formulation excipient(s)such as sodiumlauryl sulfate with or without cetostearyl alcohol may be prepackagedwithin the medicament and or substrate.

[0043] The substrate 56 is intended for single use only. That is, oncethe medicament has been electrokinetically driven from the substrateinto the treatment site, the distal portion 22 is disconnected from theproximal portion 20 and discarded without the consumer/patient touchingthe medicament or substrate. It is important to prevent reuse of thedistal portion and its used substrate and to render it disposable. Forexample, active disease particles or other biologic material on thesubstrate could cause cross-contamination if reused. Insufficientdosage, dehydration or degradation of the medicament could occur ifreused. Physical separation of the substrate from the active electrodecould occur, rendering dosage or even operability problematical uponreuse. Alternatively, the substrate 56 may be removed from theapplicator head 51 and discarded and a new substrate applied to theapplicator head. Where the medicament is prepackaged with the substrateeither by permeation within the substrate with a release film or foilseal or within a releasable or rupturable capsule within or near thesubstrate, a coloring agent can be employed, such as iodine, which turnscolor upon contact with starch in the open-cell material to visiblyindicate that a unit dose of medicament has been used. Other types ofcoloring agents can be used to indicate usage of the applicator, e.g.,pH indicators, wet saturation indicators or oxidizable pigments.

[0044] Referring to FIG. 6, it will be appreciated that the device 10 isgenerally elongated and extends generally parallel to the individual'sfinger 71 when in an extended position as illustrated. The housing 50extends at an angle relative to the direction of elongation representedby a centerline 73 in FIG. 6 of the device which generally parallelscentral portions of the individual's finger when extended. Thus, theouter planar face of the active electrode 54 extends at the same angleas the housing relative to the elongated device and faces outwardly andaway from the device and the individual's finger. The angle at anintersection between the direction of elongation (centerline 73) and aline through the planar surface of the active electrode 54 is an obtuseangle of approximately 160° but may lie within a range of about100°-185°. The angular direction of the active electrode relative to thedevice 10 facilitates application of the device to treatment sitesvariously located about an individual's body.

[0045] Reverting to FIG. 2 and in a preferred embodiment, the counterelectrode 60 is located in the distal portion 22 on the bottom of theinterior frustoconical surface. Counter electrode 60 may be covered witha conductive material, e.g., water or hydrogel, to facilitate electricalcontact with the underside of the individual's fingertip. The counterelectrode 60 is electrically insulated from the active electrode. Thecounter electrode 60 is electrically coupled to the terminal of thebattery opposite the battery terminal to which the active electrode 54is coupled when the distal and proximal portions are electricallyinterconnected with one another. It will be appreciated that by locatingthe counter electrode 60 along the inside surface of the distal portion,the act of inserting the individual's fingertip into the opening in thedistal portion ensures good electrical contact between the counterelectrode and the individual's finger. Alternatively, the counterelectrode may be exposed along the underside of the proximal portion 20for engagement with the individual's finger upon the individual donningthe finger splint medicator. In a further alternative, the counterelectrode may be located along the underside of both the proximal anddistal portions 20 and 22, respectively. Thus, a full-length portion ofthe individual's finger on opposite sides of the first finger joint andincluding the fingertip may be in contact with the counter electrode, ineither case, affording a good electroconductive contact therewith.

[0046] Referring to FIG. 8, there is illustrated a portion of anapplicator head 51 a in conjunction with a substrate 56 a separate andapart from the device per se. The applicator head 51 a is similar to theapplicator head 51, except that the active electrode 54 a forms acircular projection from the applicator head 51 a. Also illustrated inFIG. 8 is a substrate 56 a which has been removed from a package, notshown, and which substrate contains the medicament. With the substrate56 a containing the medicament interposed between the active electrode54 a and the treatment site T. S., it will be appreciated that uponcompleting the electrical circuit by coupling the distal and proximalportions to one another, the medicament in the substrate may beelectrokinetically motivated into the treatment site. As a furtheralternative, the medicament can be applied by a user directly to thetreatment site or to a non-prefilled substrate, together with anynecessary hydration material, and the circuit completed by applying theactive electrode 54 a to the medicament or medicament-containingsubstrate.

[0047] The first three stages of Herpes I and II are prodromal, erythemaand papule/edema. The preferred treatment with Acyclovir® is to identifyand treat the infection in its prodromal stage (no visible signs orsymptoms, but individuals feel a tingle or burning or some sensation inthe area that breaks out later), i.e., treat optimally with least amountof medicament and shortest application time. Erythema is second (stillquite early, with some redness and/or swelling) and is the preferredstage to start treatment if prodromal stage is missed. Papule or edemastage still responds to treatment but not as quickly (skin damage hasstarted to occur with small sores which may be barely visible).

[0048] In a preferred form of the present invention, particularly forthe treatment of Herpes I and II-type infections, Acyclovir® is themedicament of choice. Acyclovir® may be provided in a cream formulationwith approximately 5% comprising the drug Acyclovir®. For example, a 250milligram formulation of topical cream containing 12.5 milligrams ofAcyclovir®, i.e., a 5% formulation, may be utilized. Significantly, thisrelatively small amount of medicament in the formulation, when appliedelectrokinetically over a predetermined time duration, affords atherapeutically effective dose. The dosage and time of application maybe varied. For example, an approximate 2% formulation of about 4 to 5milligrams of the active medicament (e.g., Acyclovir®) in a 250milligram cream formulation applied electrokinetically over a period ofno greater than fifteen minutes or an approximate 14-15% formulation,e.g., 37 milligrams in a 250 milligram cream and Acyclovir® formulation,applied electrokinetically for approximately three minutes is believedtherapeutically effective. Percentage formulations between 2%-15% overtime durations between fifteen minutes and three minutes are believedalso to be therapeutically effective. For example, 8%-10% formulationsover 5-6 minutes' time duration are also believed therapeuticallyeffective. Thus, using the present device and a small amount of theactive medicament applied electrokinetically and locally via the presentdelivery system has been found effective. While a cream formulation ispreferred, it will be appreciated that the topical base may also be aliquid, gel, ointment or lotion.

[0049] The formulation for the medicament may also comprise an oil,water, or a combination oil and water, to facilitate penetration of theskin as the excipient(s). For example, oil facilitates penetration ofthe stratum corneum layer of the skin, while water facilitatespenetration of the basal epidermal layer. Thus, a combination of thedrug with oil and water included in the formulation is preferred tofacilitate penetration of the drug to the treatment site. In a furtherformulation of Acyclovir®, solvents such as methylene chloride orbeta-cyclodextrin may be included to improve water solubility andstability.

[0050] The foregoing treatment is also effective for treating HerpesZoster, Cytomegalovirus (CMV)and additional medicaments of choice mayinclude foscarnet and gancilovir. The device and methods hereof may alsobe used to provide electrokinetic transport, with or without ultrasound,for tamoxifen citrate, i.e., an antiestrogen, to inhibit Trans GrowthFactor β-1 (TGFβ-1) to suppress estrogen receptors to aid in woundhealing and treatment of keloid scar tissue. Also, treatment of eczemawith tacrolimus or pimecrolimus as a stand-alone therapy or withsteroids is effective. Still further, while Acyclovir® acts on thepolymerase enzyme, drug formulations which act on the helicase-primaseenzyme are also effective for treating Herpes I and II.

[0051] Referring now to FIGS. 9 and 10, there is illustrated a furtherform of an electrokinetic delivery device according to a preferredembodiment of the present invention wherein like reference numerals areapplied to like parts, preceded by the numeral 1. In this form, thedevice 110 includes proximal and distal portions 120 and 122,respectively, and contacts 142 and 144 in the distal and proximalportions, respectively, for completing the electrical circuit asdescribed herein. The proximal portion 120 includes loops 134 and tabs136 on opposite sides for securing a strap to the proximal portion andsecurement of the device to the individual's finger. The proximalportion 120 houses the electronics and power source similarly as theproximal portion 20.

[0052] The distal portion 122 is generally frustoconically shaped, as isthe distal portion 22 of the prior embodiment, and mounts a pylon or apair of pylons 123 interconnecting the frustoconical section 124 and theapplicator head 151 housing the substrate. The distal portion 122 alsocarries the counter electrode 160 which, upon interconnection of theproximal and distal portions is electrically connected to the powersource and electronics of the proximal portion 120. It will beappreciated that the undersurface of the proximal portion 120 is concaveand angled to accommodate the first finger joint and opposite sidesthereof for mounting the proximal portion on the individual's finger.Similarly, the distal portion 122 has a frustoconical interior surfacefor receiving the fingertip of the individual upon electrical andmechanical connection of the proximal and distal portions to oneanother. In FIG. 10, the device is illustrated in an operable conditionapplied to an individual's finger, with the individual's fingertipprojecting into the distal portion and in electrical contact with thecounter electrode 160.

[0053]FIG. 11 illustrates a block diagram of representative electricalcircuitry 200 for use in the finger splint medicator. Electricalcircuitry 200 includes an on/off flag 202, a power on/off switch 204, apower source 206, a switching regulator 208, processing circuitry(microprocessor) 210, a variable voltage source 212, a current clamp214, electrostatic discharge (ESD) protection circuits 216, a currenttransducer 218, and light emitting diode or diodes (LED's) 220. Theon/off flag 202 is built into the distal portion and may simply includea conducting “flag” surface which completes a circuit of the poweron/off switch 204 upon engaging to the proximal portion of the fingersplint medicator. The flag surface may, for example, be a thin (e.g.,0.032′ thick), copper-clad G10 board with copper on one side thereof.The power on/off switch may simply include two contacts connecting tothe power source 206 and to the remaining parts of electrical circuitry200.

[0054] Power source 206 is a battery such as a silver oxide batteryhaving an open-circuit voltage, for example, of 1.55V. The useful lifeof the battery terminal voltage ranging from 1 to 1.55 V is insufficientto operate circuit elements and components such as processing circuitry210 and LED's 220. The low battery voltage is tolerated due to thecompensation by switching regulator 208, which converts the unsteady anddecaying battery voltage to a constant value of, for example, 2.7V.

[0055] Skin and tissue resistance largely controls the bias potentialrequired to sustain the treatment current. Other factors include theconductivity of medicament and the resistance between the skin andcounter electrode interfaces. A typical range of overall resistance tobe encountered is from 5 kohm to 80 kohm. In the most extreme case, apotential of over 30V may be necessary. Variable voltage source 212converts the low battery voltage to a suitable high output valuecontrolled by a signal from processing circuitry 210. Measurements ofthe treatment current from current transducer 218 are compared with adesired treatment current for the particular application to obtain anerror signal. Processing circuitry 210 increases or decreases thecontrol signal to the variable voltage source 212 with an appropriatedigital output signal to reduce and eliminate the measured error signalso as to obtain the minimal necessary instantaneous bias potential formaintenance of the desired treatment current. Current clamp 214 is aredundant safety device used to limit the treatment current to a safe,maximum value (e.g., 450 microamps) under any circumstances.

[0056] Electro Static Discharge (ESD) protection circuits 216 (such asone or more diodes) are installed at the entry points of the flagterminal and the positive and negative treatment electrodes,respectively, to protect the internal circuitry from electrostaticdamage. The ESD protection circuit for the flag terminal is disposed onthe proximal side.

[0057] Current transducer 218 converts the instantaneous treatmentcurrent to an analog voltage. This voltage is read by the processingcircuitry 210 through an internal analog-to-digital (A/D) converter.This digital signal is compared with the selected treatment currentvalue scalable to the reference input voltage of the A/D converter. Adigital servo loop is maintained by the processing circuitry 210 tominimize and/or eliminate the error signal between the instantaneoustreatment current signal and the current reference. The output of theservo loop is a digital signal converted by an R/C (Resistor/Capacitor)circuit to an analog voltage, which is then used to control the variablevoltage source 212.

[0058] Processing circuitry 210 performs various tasks including, butnot limited to, timing control, current measurement, digital servo oftreatment current through feedback control of the bias potential, andillumination of LED or LED's. Processing circuitry 210 may beimplemented, for example, as a microprocessor, microcontroller, anapplication specific integrated circuit (ASIC), a programmable logicarray or some combination thereof.

[0059] Processing circuitry 210 includes read-only and/or read/writememory. In one example implementation, processing circuitry 210 includesa read/write memory such as an EEPROM. The operations of processingcircuitry 210 may be implemented in hardware, software and/or firmware.It is desirable, although not necessary, to reduce and replace hardwareelements to the extent possible by using a firmware implementation. Dataand instructions for controlling the overall operation of thefinger-splint device may be written respectively, to an EEPROM datamemory and a flash program memory, and processing circuitry 210 mayexecute the instructions in response to various signals suppliedthereto. These instructions may include instructions for:

[0060] monitoring the treatment current and the battery terminalvoltage,

[0061] providing timing control for various treatment phases includingthe initial standby period (for example, indicated by a flashing greenLED), soft-start period, main treatment period (indicated by a constantgreen LED) and the final soft stop period (indicated by the red LED).The treatment phases need not be the same for all treatments and thesephases may vary in some way depending on what is being treated. All thevariables, voltage, current, time, electrode size and shape, and thelike must be reconsidered and possibly adjusted,

[0062] illuminating the LED(s) to provide information to the user,

[0063] exciting a crystal oscillator for accurate timing reference,

[0064] resetting a watchdog timer to ensure normal software execution,

[0065] performing a self-consistency check on the accuracy ofanalog-to-digital converter by measuring the predictable voltage dropacross a circuit element (such as an LED) during a short, initialpower-up period, and

[0066] performing servo control of the treatment current by controllingthe bias potential generated by the variable voltage source via anoutput digital signal.

[0067] The data stored by the read/write memory within the proximalportion may also include a count indicative of the number of treatmentcycles for which the finger-splint device has been used. This count isincremented (or decremented) for each treatment and the device ispermanently deactivated after the count reaches a prescribed numberindicative of a predetermined number of treatments. For example, adisable flag for disabling processing circuitry 210 may be set in memorywhen the count on the counter is indicative of the prescribed number oftreatments. Alternatively or additionally, various mechanisms forpreventing the supply of power to the electrical components may be usedto permanently deactivate the device. For example, processing circuitry210 could generate a signal to burn a fuse when the count on the counteris indicative of the prescribed number of treatments. Similarly,processing circuitry 210 could generate a signal to deliberately damagea transistor or flip a solid state toggle circuit when the count on thecounter is indicative of the prescribed number of treatments. It will bereadily apparent that other mechanisms (hardware and/or software) may beused and the invention is not limited in this respect.

[0068] In another example implementation, the read/write memory maystore a total treatment time, which is incremented (or decremented) inaccordance with a timer during treatment. When the total treatment timereaches some prescribed total treatment time, the device may bepermanently deactivated. Here again, for example, the various hardwareand/or software disabling mechanisms described above may be used topermanently deactivate the device.

[0069] In still another example implementation, the proximal portion maybe disabled from use for a predetermined time period after each usewhereby the next use can only occur after the predetermined time periodhas expired. In this case, a disable flag could be set for thepredetermined time period and processing circuitry 210 could preventoperation of the proximal portion when this flag is set.

[0070] Also, the distal portion may be deactivated permanently after asingle usage. Here again, various mechanisms for prevention of re-use ofthe distal portion may be used. For example, processing circuitry 210could generate a signal to burn a fuse incorporated in the distalportion at the end of a treatment. Similarly, processing circuitry 210could generate a signal to deliberately damage a transistor or flip asolid state toggle circuit incorporated in the distal portion at the endof a treatment. It will be readily apparent that other mechanisms(hardware and/or software) may be used and the invention is not limitedin this respect.

[0071] Processing circuitry 210 may be programmed with (or haveaccessible thereto) instructions for a plurality of different types oftreatments (e.g., herpes, eczema, acne, boils, blemishes and the like).For example, the desired treatment current, ramp-up/ramp downcharacteristics and total treatment time for herpes may be differentthan the desired treatment current, ramp-up/ramp-down characteristicsand total treatment time for eczema. The determination of whichinstructions to use may be based upon a detection (or “recognition”) ofa particular type of distal portion attached thereto. For example, adistal portion for the treatment of herpes may be configured (eitherphysically or electrically) differently than the distal portion for thetreatment of eczema. The configuration of the distal portion isdetectable by processing circuitry 210 so that processing circuitry 210thereafter executes instructions appropriate for the particular type ofdistal portion connected thereto.

[0072] In another implementation, the distal portion may be providedwith an interface for interfacing to a computer. Such an interface may,for example, be a serial port, a parallel port, a USB port, an IEEE 1394port, etc. The interface may take the form of a cradle or dockingstation into which the distal portion is placed, the cradle or dockingstation connecting to the computer. The interface to a computer allowsthe uploading and downloading of data from/to the distal portion. Forexample, a physician, pharmacist or other health care provider coulddownload to the distal portion instructions appropriate for a particulartreatment. Alternatively, an appropriate one of a plurality ofdifferent, pre-programmed instruction sets may be selected. Processingcircuitry 210 may be programmed to record in memory treatmentinformation (such as the time a treatment took place, the duration ofthe treatment, the distal portion type connected thereto, etc.) . Thisrecorded information may be uploaded to a database containing treatmentrecords for the user via the computer interface.

[0073] Assuming appropriate power is available, the distal and/orproximal portion may be provided with additional elements. For example,a small liquid crystal display (LCD) could be provided to the distal orproximal portion to provide a visual output of timing and/ordiagnostics. Sound generating circuitry such as a buzzer may also beadded to provide aural indications such as warnings, end-of-treatment,etc.

[0074]FIG. 12 is a schematic showing details of example electricalcircuitry 200. Battery 300 corresponds to power source 206 (FIG. 11) andmay, for example, have an open-circuit voltage of 1.55V and a ratedcapacity of 200 mAhr. A suitable battery may be, but is not limited to,EPX76 1.5V silver oxide battery (designation: IEC SR44) available fromEveready Battery Co., Inc. Such a battery would provide for about 10treatment sessions, if each were ten minutes in length.

[0075] Components U1, L1, D1, C1 and C2 correspond to switchingregulator 208 (FIG. 11) for converting the battery voltage to a constantvalue of, for example, 2.7 V. U1 may be, but is not limited to, anNCP1402SN27T1 step-up DC-DC converter (TSOP-5) available from OnSemiconductor, Inc. L1 may be, but is not limited to, ELJ-EA470KF, 47microhenry inductor (SMT-1210) available from Panasonic Industrial Co.D1 may be, but is not limited to, an RB751V40T1 Schottky barrier diode(SOD-323) available from On Semiconductor Inc. C1 and C2 may be, but arenot limited to, a 22 microfarad, 4V tantalum capacitor (A case) and a 47microfarad, 4V tantalum capacitor (B case), respectively.

[0076] Component U4 corresponds to processing circuitry 210 and may be,but is not limited to, a PIC16F85 microcontroller (SSOP-20) availablefrom Microchip Technology Inc.

[0077] Components U2, L2, D2 and C3 function as variable voltage source212 (FIG. 11) for converting the low battery voltage to a high outputvalue. U2 may be, but is not limited to, an S-8324D20MC switchingregulator (SOT-23-5) available from Seiko Instruments USA. L2 may be,but is not limited to, an ELJ-EA101KF, 100 microhenry inductor availablefrom Panasonic Industrial Co. D2 may be, but is not limited to, anMBR0540T1 Schottky barrier diode (SOD-123) available from OnSemiconductor Inc. C3 may be, but is not limited to, a 1 microfaradceramic capacitor (50V, Y5V, SMT-1206) Variable voltage source 212 iscontrolled in accordance with a signal from processing circuitry 210.Based on measurements of the treatment current, processing circuitry 210calculates an appropriate digital output signal to obtain aninstantaneous bias potential. Component R4 coupled with C4 functions asa simple digital-to-analog converter. R4 may be, but is not limited to,a 10K ohm, 1% metal film resistor (SMT-0603). C4 may be, but is notlimited to, a 0.1 microfarad ceramic capacitor (10V, X7R, SMT-0402).

[0078] Components U3 and R2 correspond to current clamp 214 (FIG. 11)and limit the treatment current to a maximum, safe value such as, forexample, 450 microamps. U3 may be, but is not limited to, an LM334Mcurrent source (SO-8) available from National Semiconductor Corp. R2 maybe, but is not limited to, a 150 ohm, 1% metal film resistor (SMT-0603).

[0079] D3, D7 and D8 correspond to (ESD) protection circuits 216 (FIG.11) and D3 comprises 36 V bi-directional voltage suppressor (TVS), whichis installed at the positive electrode. This TVS protects internalcircuitry from electrostatic damage. D3 may be, but is not limited to,an SMAJ36CA transient voltage suppressor (SMA) available from DiodesInc. D7 and D8 may be, but are not limited to, a PSD03C 3.3V transientvoltage suppressors (SOD-323) available from ProTek Devices.

[0080] R5 corresponds to current transducer 218 (FIG. 11) and convertsthe treatment current to an analog voltage, which is further stabilizedby C5. R5 may be, but is not limited to, a 4.99 Kohm, 1% metal filmresistor (SMT-0603). C5 may be, but is not limited to, a 0.47 microfaradceramic capacitor (50V, Z5U, SMT-0805).

[0081] Green LED D6 and red LED D5 correspond to LEDs 220. SuitableLED's include, but are not limited to, a green diffused LED and a reddiffused LED available from American Bright Optoelectronics Corp.(BL-B22131 and BL-B4531). Green LED D6 remains on during the entiretreatment period. The LED normally requires a current limiting resistorfor its operation and the resulting power consumption is quitesubstantial. As shown in FIG. 12, a capacitor C8 switched in accordancewith U5 operates as an efficient current limiting device. The situationwith red LED D5 is different in that on the rare occasions when it isilluminated, the treatment current is switched off and resistor R3 andthe resulting power consumption can be tolerated. U5 may be, but is notlimited to, an Sil905DL dual P-channel MOSFET (SC-70-6) available fromVishay Intertechnology Inc.

[0082] The electronic circuitry described in connection with FIGS. 11and 12 is operable so that the finger-splint electrokinetic medicatorprovides a controlled current for electrokinetically transportingmedicament into the treatment site and into the underlying tissue area.The disclosed electronic circuitry provides an effective therapeutic fora skin lesion by incorporating the following features:

[0083] the treatment current is increased and decreased gradually toavoid any uncomfortable sensation of electrical shock, the rise and fallof current may follow a linear ramp or an exponential curve with a longtime constant, (e.g., 10 seconds),

[0084] the treatment current per application is accurately controlled byautomatic feedback, e.g., maintained at 0.4 milliamperes or less,

[0085] an upper limit of the treatment current is imposed by a stand-byredundant circuit element in order to safeguard against servo loopmalfunction,

[0086] minimal bias potential, dictated largely by patient skinresistance, is always applied in order to minimize power consumption,

[0087] ESD protection is implemented for electronic circuitry,

[0088] indicator light(s) are provided for low battery conditions,diagnostics, hardware malfunction, low treatment current, and testcompletion, therapeutic phase,

[0089] the prescribed treatment time period and automatic testtermination are accurately controlled, and

[0090] treatment history is monitored and the device is permanentlydeactivated after reaching a prescribed length of time and/or number oftreatments or uses.

[0091] The circuit described in connection with FIGS. 11 and 12 providethese identified features. However, the present invention is notintended to be limited to only circuits that provide for all thesefeatures. In addition, it will be appreciated that the specificcomponents and the arrangements thereof shown in FIGS. 11 and 12 areprovided by way of example, not limitation. For example, power source300 may be an adapter for converting power from a conventional walloutlet to power suitable for operation of the finger splint.Alternatively, power source 300 may be a battery that is rechargeablevia an adapter connected to a conventional wall outlet. In addition, theelectronic circuitry may be adapted to include an alternating currentsource as described in application Ser. No. 09/523,217, filed on Mar.10, 2000, the contents of which are incorporated herein by reference,including the hybrid multi-channel design. In still other alternativeimplementations, the power source may be provided in the distal portionor the distal portion may be provided with a power source to supplementthe power source in the proximal portion.

[0092]FIGS. 19A and 19B are flow charts illustrating an exampleoperation of the device 10. At step 502, the distal portion 22 isengaged with the proximal portion 20 and power is turned on at step 504when flag surface 202 completes the circuit of the power on/off switch204. Processing circuitry 210 performs a battery test operation (step506) to determine if the battery is okay. If not, the red LED is flashedfor a predetermined period of time (e.g., one minute) (step 508) and thepower is then switched off (step 510). If the battery is okay,processing circuitry 210 determines whether the number of uses of theproximal portion is less than a prescribed number of uses. If not, thered LED is flashed for a predetermined period of time (step 508) and thepower is then switched off (step 510).

[0093] If the number of uses is less than the prescribed number, thegreen LED is flashed for a predetermined period of time (e.g., 10seconds) (steps 514 and 516). Then, processing circuitry 210 begins toramp up the treatment current (step 518). After the treatment current isramped up, treatment begins. During treatment, processing circuitry 210checks to determine whether the current is greater than 360 microamps.If not, the green LED is flashed (step 522) and the processing circuitryproceeds to the battery test operation (step 526). If the current isgreater than 360 microamps, the green LED is kept on (step 524) beforeproceeding to the battery test operation.

[0094] If the battery fails the battery test operation, the red LED isflashed for a predetermined period of time (step 508) and then the poweris switched off (step 510). If the battery is okay, processing circuitry210 determines whether the treatment time period (e.g., 10 minutes) haselapsed. If not, control returns to step 520. If the treatment timeperiod has elapsed, the ramp down of the treatment current begins andthe green LED is kept on (step 530). When processing circuitrydetermines that the treatment current has decreased below 50 microamps(step 532), the red LED is turned on (step 534) and kept on for apredetermined period of time (e.g., one minute) (step 536). After thispredetermined period of time, the red LED is turned off and thetreatment number is incremented (step 538). After a predetermined periodof time elapses (e.g., 4 hours) (step 540), the power is switched off(step 542).

[0095]FIG. 19B shows the treatment current servo loop which is executedalmost continuously throughout the treatment. At step 560, the treatmentcurrent is sampled and converted from an analog value to a digitalvalue. At step 562, a determination is made as to whether the sampledtreatment current is equal to the reference treatment current for thecurrent treatment. If so, control returns to step 560 where thetreatment current is sampled again.

[0096] If the sampled treatment current is not equal to the referencecurrent at step 562, a determination is made at step 564 as to whetherthe treatment current is greater than the reference current. If so, thecontrol data output of the processing circuit is decreased and thisoutput is converted from a digital value to an analog value at step 568.If the treatment is not greater than the reference current, adetermination is made at step 570 as to whether the treatment current isless than the reference current. If so, the control data output of theprocessing circuit is increased and this output is converted from adigital value to an analog value at step 568.

[0097] When using the device 10, 110 hereof, the individual may applythe proximal portion 20, 120 in overlying relation to a finger,preferably the index finger, to be used to apply the medicament to thetreatment site. Thus, the proximal portion 20, 120 is overlaid outsideportions of the individual's finger, straddling opposite sides of thefirst knuckle joint and secured thereto by straps 14, 114. The substrate56, 156 is preferably prepackaged with a unit dose of medicament andsupplied within the applicator head of the distal portion 22, 122. Ifnot, the substrate may be applied to the recess 52, 152 of theapplicator head on the distal portion 22, 122 of device 10, 110 with orwithout the medicament. Particularly, the substrate 56, 156 may beinserted into the recess 52, 152 such that the medicament or hydrationmaterial within the substrate makes electrical contact with the activeelectrode 54, 154. If the medicament is electrokinetically transportableand contained in the substrate, the device is ready for use uponconnecting the distal portion 22, 122 with the proximal portion 20, 120.Alternatively, if the medicament is not permeated within the substrate,the individual may apply the medicament to the substrate or over thetreatment site with suitable hydration material being applied asnecessary or desired. Alternatively, if the medicament is provided in areleasable or rupturable capsule in the substrate, the individual mayapply pressure to the substrate in the applicator head, rupturing thecapsule, enabling the medicament from the capsule to permeate throughthe open interstices of the porous substrate. If the medicament is notiontophoretically transportable, the substrate may be hydrated byapplying water or saline to the substrate.

[0098] Once the medicament is enabled for electrokinetic transport, thefrustoconical section 40, 140 of the distal portion 22, 122 may bereceived about the individual's fingertip and contact made with theproximal portion by interconnecting the contacts 42, 142 and 44, 144. Byapplying the distal portion 22, 122 to the proximal portion 20, 120 andupon application of the applicator head to the treatment site, theelectrical circuit is completed. Thus, the electrical circuit includesthe active electrode 54, 154, the medicament or the hydration materialused to electrokinetically transport the medicament, the treatment site,the individual's body, a return through the counter electrode, the powersource and electronics to the active electrode 54, 154.

[0099] A treatment program may comprise one or more applications ofmedicament to a treatment site using the finger splint device describedabove. For example, a treatment program may comprise five applicationsof medicament. After each application of medicament, the disposabledistal portion is removed from the proximal portion, and a new distalportion is connected to the (re-usable) proximal portion prior to thenext application. In some instances, it may be desirable to vary theamount and/or efficacy of the medicament from one application to thenext. For example, the amount of medicament used for the firstapplication may be greater than the amount of medicament used for somesubsequent application. Thus, a user of the finger splint device maypurchase a treatment “package” comprising a plurality of distal portions(e.g., one or more having different amounts of medicament) to be used ina predetermined order. The distal portions may be configuredelectrically and/or mechanically in a manner that permits the processingcircuitry of the proximal portion to detect which distal portion isconnected thereto. By way of example, not limitation, the distal portionmay include registers readable by the proximal portion. The registersmay include information such as, but not limited to, the number of thatdistal portion in a particular order of use of distal portions. If theprocessing circuitry is programmed to track the medicament applications(e.g., by incrementing a hardware or software counter as each medicamentapplication is completed), the proximal portion can inform the user(e.g., via the red LED or some other output device such as an LCD ifprovided) when a wrong distal portion (e.g., an out-of-sequence distalportion) is connected thereto. The detection of the distal portionconnected thereto can also be used by the processing circuitry to set atimer fixing an amount of time that must pass before the next medicamentapplication. The proximal portion is disabled to prohibit its use untilthis time period elapses.

[0100] In addition, it will be appreciated that the same proximalportion may be used with more than one type of distal portion. Thus, forexample, the proximal portion may be selectively connected to one typeof distal portion containing medicament for use in the treatment ofherpes or to another type of distal portion containing medicament foruse in the treatment of eczema. These distal portions may be configuredelectrically and/or mechanically so that the processing circuitry of theproximal portion can detect the type of distal portion connectedthereto. In response to this detection, the proximal portion can, forexample, use operating instructions suitable for a medicamentapplication using the distal portion connected thereto.

[0101] The processing circuitry of the proximal portion may beprogrammed with (or have accessible thereto, e.g., via a memory) aplurality of different treatment current profiles (treatment currentversus time), wherein the treatment current profile that is actuallyused depends upon the distal portion connected thereto. For example, inthe case in which a treatment program comprises a plurality ofapplications of medicament, the treatment current profile for the firstmedicament application may be different than the treatment currentprofile for the last medicament application. Similarly, the treatmentcurrent profile for a herpes treatment program may be different than thetreatment current profile for an eczema treatment program. Here again,the distal portions may be configured electrically and/or mechanically(e.g., using registers on the distal portion) in a manner that permitsthe processing circuitry of the proximal portion to detect which distalportion is connected thereto. In this way, the processing circuitry canuse the treatment current profile appropriate for the proximal portionconnected thereto.

[0102] Referring now to FIG. 13, there is illustrated a furtherembodiment of a device for electrokinetically transporting a medicamentinto the skin and is particularly useful for applying medicament overlarge wide areas of an individual's face. For example, the illustratedmask, generally designated 150, may be used to treat dermatologicalconditions, e.g., eczema, psoriasis acne, boils, blemishes, provideanesthesia, or to provide dermal exfoliation. Treatment for wrinkles maybe accomplished by delivering a modulator of collagen deposition, anorganic nitrate, e.g., gallium nitrate. Treatment with metronidazole forrosecea is also beneficial. In this form of the present invention, theremay be provided a full face mask 155 (FIG. 13) or a partial face mask154 (FIG. 12). The face masks 152 and 154 may be formed of a matrix,e.g., a plastic or fabric material, which may be flexible for providingcontact between an underlying medicament-carrying substrate 156. Theunderlying substrate 156 is formed of a porous material similarly as thesubstrates previously discussed. The porous material preferably hashoneycomb cells which divide the substrate laterally to minimize lateraldisbursement of the medicament contained in the substrate.

[0103] An electrical connector 158 carried by the mask connects anelectrical power source to the mask via a plurality of independent orisolated electrical current channels or lead wires 160 carried by thematrix to form individual electrical conductive channels in the matrix.The current flowing through the channels is separately controlled toprevent tunneling of the current which would adversely affect the user.

[0104] The face mask is preferably portable, although it will beappreciated that the power supply can be provided either by an adapterplugged into a conventional electrical current supply or a “tabletop” or“portable” type unit with batteries that may be either disposable orrechargeable. Preferably, however, the power supply may be disposed in ahousing portion 162 which corresponds in functionality to theelectronics and power source contained in the proximal portionpreviously discussed. Additionally, another housing portion 164 isadapted for releasably coupling with the portion 162. As in the priorembodiments, connection of housing portions 162 and 164 activates thedevice. Portions 162 and 164 may serve, in effect, as an on/off switchfor activating the device. As illustrated, the proximal portion 162 iselectrically coupled to another portion of the face mask through acounter electrode 166. It will be appreciated, however, that the counterelectrode 166 may be applied to other parts of the individual's body tocomplete the electrical circuit. For example, the counter electrode 166may extend about the periphery of the mask 155 in contact with theindividual's skin.

[0105] To utilize the electrokinetic device in the form of a face mask,the user dons the mask and attaches the mask to overlie the skin surfaceon the face by securing straps 170 about the back of the head. It willbe appreciated that the substrate contains the medicament to be appliedelectrokinetically to the individual's face and thus lies inregistration with the individual's face. Also note that the electricalconductors or electrodes 160 are closely spaced relative to one anotherto provide broad coverage, only a small number of the electrodes 160being illustrated for clarity. Consequently, with the face mask appliedas illustrated, the user couples the distal and proximal portions 164and 162, respectively, to one another, completing the circuit from thepower source, through the distal portion, the electrical conductors 160which electrokinetically motivate the medicament into the facial skin,and the counter electrode for return to the power source. Alternatively,the coupling of the distal and proximal portions may enable the circuit,provided an on/off switch in the circuit is turned “on.” A multi-channelsystem is provided in the face mask and particulars of the multi-channelsystem are disclosed in U.S. Pat. No. 5,160,316, issued Nov. 3, 1992,the disclosure of which is incorporated herein by reference.

[0106] In FIG. 14, like parts as in FIG. 13 are designated by likereference numerals followed by the suffix “a”. The mask 155 isabbreviated from that illustrated in FIG. 13 and overlies facial regionsabout the eyes and nose of the individual and may cover substantiallythe entire forehead and portions of the cheeks or possibly include theneck or be a separate specific neck treatment applicator. Theelectromechanical elements of the embodiment are similar to those ofFIG. 13 and include the underlying medicament carrying porous substrate156 a, electrical connector 158 a, lead wires 160 a, proximal and distalportions 162 a and 164 a, respectively, and a counter electrode 166 a.The functionality of these elements is the same as in the previousembodiment.

[0107] In a further embodiment of the present invention, there isillustrated with reference to FIGS. 15 and 16 a finger-mountedelectrokinetic delivery device, generally designated 200, for theself-administration of a medicament and generally in the form of a ringcarried by or applied about an individual's finger, preferably the indexfinger. Ring 200 includes a body 202. The generally ring-shaped body 202has a through-opening 204 to receive the individual's finger and whichopening is flanked by a pair of arcuate sections 206 which, togetherwith a top portion of body 202, form a split ring for maintaining thedevice 200 on the individual's finger. It will be appreciated, ofcourse, that body 202 may comprise a full circular ring withoutinterruption, although the split ring form is believed preferable toprovide flexibility and to accommodate different finger sizes.

[0108] The device 200 is self-contained and thus includes within thebody 202 a power source 208 and electronics 210, as well as electricalconnections 212 and 214 for electrically connecting the power source andelectronics to an active electrode 216 and a counter electrode 218,respectively. The power source 208 and electronics 210 are similar tothose described previously in the prior embodiments. The activeelectrode 216 may be in the form of a disk disposed in a recess 220,preferably circular, along the flat outer surface 222 of the ring-shapedbody. Overlying the active electrode 216 and in contact therewith is acorresponding generally circular substrate 224 having the sameattributes as the substrates 56, 156 previously described. Substrate 224is maintained on the body 202 by a cap 226 secured to the flat outersurface 222 of the body and having marginal portions 228 overlyingmargins of the substrate 224. As in the prior embodiments, the substrate224 contains a unit dose of medicament, and hydration material, ifnecessary, prepackaged with the device 200 for one-time disposable use.Alternatively, the substrate 224 may be separately packaged with a unitdose of medicament and hydration material, if necessary, apart fromdevice 200 and applied to the device 200 and removed therefrom for eachuse whereby the device 200 may be reused with successive one-time useprepackaged substrates with medicament. As in previous embodiments, theouter contact surface of the substrate which is to be applied to thetreatment site may be overlaid with a foil or releasable film, e.g., asillustrated in FIG. 7, to protect the contact surface and medicamentprior to use.

[0109] The counter electrode 218 is preferably formed along the insideconcave surface of the ring-shaped device 200. It will be appreciatedthat upon applying the ring-shaped body 202 to the individual's finger,the counter electrode 218 will automatically lie in electrical contactwith the individual's finger. That is, the flexible side sections 206 ofthe device 200 bias the body 202 such that counter electrode 218 ispressed against the individual's finger. As illustrated in FIG. 16, thered and green LED's are indicated 230 and 232 along one side of thedevice to afford the indications described previously.

[0110] To use the device, the ring is disposed about the individual'sfinger. The device 200 may be provided with an on/off switch to enablethe circuit between the active and counter electrodes and through theindividual's body. Alternatively, the circuit may be activated inresponse to application of the ring-shaped body about the individual'sfinger. For example, the counter electrode 218 may be movable from anoutwardly exposed position within the opening 204 to a position lyingflush with the interior surface of the ring-shaped body 202 and whichmovement completes the internal circuit within the body 200 between theactive and counter electrodes. With the ring mounted on an individual'sfinger, it will be appreciated that the substrate can be disposed over atreatment site which completes the electrical circuit through theindividual's body and enables electrokinetic transport of the medicamentinto the treatment site. At the end of the treatment period, the devicemay be removed from the individual's finger and discarded in itsentirety. Alternatively, the device is removed from the individual'sfinger and substrate may be removed from the ring and replaced by afresh medicament-containing substrate for subsequent treatment. Ofcourse, if reuse of the device with a fresh substrate is indicated, theon/off switch is placed in the “off” condition or the circuit may beinterrupted automatically upon removal of the device from theindividual's finger and return of the counter electrode 218 to itsprojecting position within the opening 204.

[0111]FIGS. 17 and 18 are a bottom view and a side perspective view,respectively, of a patch applicator 300. The patch applicator isintended for limited (one-or two-time) use, after which it is disposed.Patch applicator 300 includes an active electrode 302 and a counterelectrode 304. Embedded within the applicator body 306 are a battery308, a switch 310 and an ASIC 312. Optionally, an LED may be provided.Switch 310 may be a touch-sensitive switch (e.g., membrane) so that theuser's finger applied to the counter electrode 304 to hold theapplicator in place at the treatment site activates the patchapplicator. ASIC 312 controls the treatment current, treatment time,etc. as appropriate for the treatment for which the patch applicator isintended. The optional LED may be illuminated to provide a visualindication that the patch applicator is activated. Alternatively, anon-ultrasound generated vibration can be added or used in lieu of theLED to indicate a working status of the device and that the device liesin a closed current loop via the individual's body surface.

[0112] While the invention has been described in connection with what ispresently considered to be the most practical and preferred embodiment,it is to be understood that the invention is not to be limited to thedisclosed embodiment, but on the contrary, is intended to cover variousmodifications and equivalent arrangements included within the spirit andscope of the appended claims.

What is claimed is:
 1. An electrokinetic delivery system for personaluse in self-administration of a medicament to a treatment site on anindividual, comprising: a device for releasable securement to anindividual's finger and shaped in part to conform to at least a portionof the individual's finger; a retainer for releasably securing thedevice to the individual's finger; a self-contained power source carriedby said device; a first electrode carried by said device adjacent adistal end portion thereof and adjacent the tip of the individual'sfinger upon retention of the device on the individual's finger, saidfirst electrode being in electrical contact with said power source; asecond electrode carried by said device for electrical contact with aportion of the individual's body, said second electrode being inelectrical contact with said power source whereby, upon application ofsaid first electrode to a treatment site with the medicament interposedbetween the first electrode and the treatment site and completion of anelectrical circuit through the first electrode, the medicament orconductive carrier therefor, the treatment site, the individual's body,said second electrode and said power source, said device causes anelectrical current to flow for electrokinetically driving the medicamentinto the treatment site.
 2. A system according to claim 1 wherein saiddevice in part extends generally linearly along the individual's finger,said first electrode being angled relative to said linear extendingdevice.
 3. A system according to claim 1 wherein said distal end portionof said device is shaped to in part overlie a portion of the tip of theindividual's finger to facilitate retention of the device on theindividual's finger.
 4. A system according to claim 1 wherein saiddevice includes a proximal end portion, said distal and proximal endportions being releasably secured to one another.
 5. A system accordingto claim 4 wherein said proximal end portion carries said power source,and mating electrical contacts carried by said distal and proximal endportions for electrically connecting said first electrode and said powersource upon releasable securement of said proximal and distal portionsto one another, said contacts being separable from one another uponseparation of the distal and proximal end portions from one another. 6.A system according to claim 1 wherein said device includes a proximalend portion, said distal and proximal end portions being engageable withone another to form a substantially unitary body along an extent of theindividual's finger and separable from one another, said proximal endportion carrying said power source, and electrical contacts carried bysaid distal and proximal end portions, respectively, for electricalcontact with one another when said proximal and distal end portions areengaged with one another and electrical disconnection from one anotherwhen said proximal and distal end portions are disengaged with oneanother.
 7. A system according to claim 1 wherein said device is in partshaped to conform generally with the portion of the individual's fingerextending from a tip thereof to a location past the first finger jointand includes a proximal end portion, said distal and proximal endportions being engageable with one another to form a substantiallyunitary body along the individual's finger and separable from oneanother, said proximal end portion carrying said power source,electrical contacts carried by said distal and proximal end portions,respectively, and being electrically connected to one another inresponse to engagement of said distal and proximal end portions with oneanother for electrically connecting said first electrode and said powersource, said contacts being electrically disconnected relative to oneanother in response to separation of said proximal and distal endportions from one another.
 8. A system according to claim 1 wherein saidsecond electrode is carried by said device for contact with a portion ofthe individual's finger.
 9. A system according to claim 1 wherein saiddevice includes an elongated body for extending along an outer surfaceof the individual's finger, said distal end portion carrying said secondelectrode along a side of the device remote from said elongated body forengagement by a fingerprint side of the individual's fingertip, saidfirst electrode being carried on a side of said distal end portionremote from the second electrode and the individual's fingertip, saidsecond electrode being electrically insulated from said first electrode.10. A system according to claim 9 wherein said elongated body has inpart a concave arcuate configuration along an underside thereof forgenerally conforming to an outer surface of the individual's finger. 11.A system according to claim 9 wherein said distal end portion has anenclosure surrounding the individual's finger with at least one open endfor receiving the individual's fingertip within the enclosure.
 12. Asystem according to claim 11 wherein said enclosure is open at oppositeends thereof.
 13. A system according to claim 9 wherein said retainerincludes at least one flexible strap connected to said body forreleasably securing said elongated body to the individual's finger. 14.A system according to claim 1 wherein said device includes an elongatedbody extending in a direction generally parallel to a length directionof the individual's finger, said elongated body having a concave arcuateconfiguration along an undersurface thereof for general conformance toan outer elongated surface of the individual's finger.
 15. A systemaccording to claim 1 wherein said second electrode is carried by saidshaped part for engagement between said device and the individual'sfinger portion affording electrical contact between the power source andthe individual's finger through said second electrode, a substratehaving a first surface and a second surface opposite said first surface,said substrate including a plurality of cells forming a plurality ofapertures between said first and second surfaces for containing themedicament, said first surface of said substrate lying in contact withsaid first electrode for electrokinetically driving the medicament fromsaid substrate cells into said treatment site upon application of thesecond surface of said substrate to said treatment site.
 16. A systemaccording to claim 1 wherein said second electrode is carried by saidshaped part for engagement between said device and the individual'sfinger portion affording electrical contact between the power source andthe individual's finger through said second electrode, a poroussubstrate having a first surface and a second surface opposite saidfirst surface and a unit dose of medicament in said substrate, saidfirst surface of said substrate lying in contact with said firstelectrode for electrokinetically driving the medicament from saidsubstrate through said second surface into the treatment site.
 17. Asystem according to claim 1 wherein said second electrode is carried bysaid shaped part for engagement between said device and the individual'sfinger portion affording electrical contact between the power source andthe individual's finger through said second electrode, a substratecomprised of a porous matrix and a rupturable reservoir formed of amaterial inert to said medicament and containing a unit dose thereof,said substrate lying in contact with said first electrode whereby, uponrupture of said reservoir, the medicament is electrokinetically drivenfrom the porous substrate into the treatment site.
 18. A systemaccording to claim 1 wherein said distal end portion includes a housinghaving a recess opening outwardly of said device, said first electrodecarried by said housing adjacent a base of said recess, including aporous substrate having a first surface and a second surface oppositesaid first surface and a unit dose of medicament in said substrate, saidfirst surface of said substrate lying in contact with said firstelectrode for electrokinetically driving the medicament from saidsubstrate through said second surface into the treatment site.
 19. Asystem according to claim 1 wherein said distal end portion includes ahousing, said first electrode being carried by said housing andprojecting from said housing.
 20. A system according to claim 1 whereinsaid second electrode is carried by said shaped part for engagementbetween said device and the individual's finger portion affordingelectrical contact between the power source and the individual's fingerthrough said second electrode, said device including an elongated bodyextending generally parallel to the individual's finger when extended,said distal end portion including a housing carrying said firstelectrode, said first electrode having a generally planar surface in aplane extending at an angle relative to the elongated body.
 21. A systemaccording to claim 20 including a distal end portion having an enclosuresurrounding the individual's finger with at least one open end forreceiving the individual's fingertip within the enclosure, said housingbeing located on a side of said distal end portion adjacent an undersideof the individual's finger with the planar surface of said firstelectrode facing outwardly away from the individual's finger.
 22. Asystem according to claim 20 including a substrate within said housing,said substrate having a first surface and a second surface opposite saidfirst surface, said substrate including a plurality of cells forming aplurality of apertures between said first and second surfaces forcontaining the medicament, said first surface of said substrate lying incontact with said first electrode for electrokinetically driving themedicament from said substrate cells into said treatment site uponapplication of the second surface of said substrate to said treatmentsite.
 23. A system according to claim 22 wherein said proximal endportion carries said power source, and mating electrical contactscarried by said distal and proximal end portions for electricallyconnecting said first electrode and said power source upon releasablesecurement of said proximal and distal portions to one another, saidcontacts being separable from one another upon separation of the distaland proximal end portions from one another.
 24. A system according toclaim 1 including means for preventing completion of the electricalcircuit in response to a predetermined number of uses of the device. 25.A system according to claim 1 including means for preventing completionof the electrical circuit in response to a predetermined time durationcorresponding to an aggregate total time usage.
 26. A system accordingto claim 1 including means for inactivating said device for apredetermined time period and means for reactivating said device aftersaid predetermined time period.
 27. A system according to claim 1wherein said device includes a proximal end portion, said distal andproximal end portions being releasably secured to one another, and meansfor preventing reuse of said distal end portion after a one-time use.28. An electrokinetic delivery system for personal use inself-administration of a medicament to a treatment site on anindividual, comprising: a device having a generally ring-shaped body anda through-opening for receiving and releasably retaining the device onthe finger of the individual; a self-contained power source carried bysaid device; a first electrode carried by said device in electricalcontact with said power source; a second electrode carried by saiddevice for electrical contact with a portion of the individual's body,said second electrode being in electrical contact with said power sourcewhereby, upon application of said first electrode to a treatment sitewith the medicament interposed between the first electrode and thetreatment site and completion of an electrical circuit through the firstelectrode, the medicament or conductive carrier therefor, the treatmentsite, the individual's body, said second electrode and said powersource, said device causes an electrical current to flow forelectrokinetically driving the medicament into the treatment site.
 29. Asystem according to claim 28 wherein said second electrode is carried bysaid device along an inside surface of the ring-shaped body and exposedwithin said through-opening for contact with the individual's fingerreceived therein.
 30. A system according to claim 28 wherein saidgenerally ring-shaped body is a split ring.
 31. A system according toclaim 28 including a substrate having a first surface and a secondsurface opposite said first surface, said substrate including aplurality of cells forming a plurality of apertures between said firstand second surfaces for containing the medicament, said first surface ofsaid substrate lying in contact with said first electrode forelectrokinetically driving the medicament from said substrate cells intosaid treatment site upon application of the second surface of saidsubstrate to said treatment site.
 32. A system according to claim 28including a porous substrate having a first surface and a second surfaceopposite said first surface and a unit dose of medicament in saidsubstrate, said first surface of said substrate lying in contact withsaid first electrode for electrokinetically driving the medicament fromsaid substrate through said second surface into the treatment site. 33.A system according to claim 28 including a substrate comprised of aporous matrix and a rupturable reservoir formed of a material inert tosaid medicament and containing a unit dose thereof, said substrate lyingin contact with said first electrode whereby, upon rupture of saidreservoir, the medicament is electrokinetically driven from the poroussubstrate into the treatment site.
 34. A system according to claim 28including means for preventing completion of the electrical circuit inresponse to a predetermined number of uses of the device.
 35. A systemaccording to claim 28 including means for preventing completion of theelectrical circuit in response to a predetermined time durationcorresponding to an aggregate total time usage.
 36. A system accordingto claim 28 including means for inactivating said device for apredetermined time period and means for reactivating said device aftersaid predetermined time period.
 37. A method of treatment byelectrokinetic self-administration of a medicament into a treatment sitefor an individual, comprising: providing a device shaped in part toconform to at least a portion of an individual's finger and having aself-contained power source, first and second electrodes, and asubstrate in electrical contact with said first electrode and includingan electrokinetically transportable medicament and an exposed contactsurface; releasably retaining the device on the individual's finger,with the second electrode in electrical contact with the individual'sfinger; while the device remains retained on the individual's finger,placing the contact surface of said substrate into contact with theindividual's treatment site; and causing electrical current to flowthrough said first electrode, the medicament or a conductive carriertherefor, the treatment site, the individual's body, said secondelectrode and said power source to electrokinetically drive themedicament into the treatment site.
 38. A method according to claim 37including providing said device with discrete separable distal andproximal portions having respective electrical contacts, connecting saiddistal and proximal portions to one another and electrically couplingthe respective electrical contacts of the distal and proximal portionswith one another to enable flow of the electrical current.
 39. A methodaccording to claim 37 including providing said device with a concavesurface for contact about the individual's finger and providing saidsecond electrode along said arcuate surface for contact with theindividual's finger.
 40. A method according to claim 37 includingproviding said device with discrete separable distal and proximalportions having respective electrical contacts connecting said distaland proximal portions to one another, and electrically coupling saidcontacts with one another to enable an electrical circuit between saidfirst and second electrodes and through said power source.
 41. A methodaccording to claim 37 including providing said device with discreteseparable distal and proximal portions and activating said device inresponse to connecting said distal and proximal portions to one another.42. A method according to claim 41 including providing said first andsecond electrodes on said distal portion.
 43. A method according toclaim 42 including providing said second electrode along a concavesurface of said distal portion for electrical contact with theindividual's finger, and providing said first electrode along anunderside of said distal portion with said substrate facing outwardly ofsaid distal portion.
 44. A method according to claim 41 includingproviding said second electrode along a concave surface of said proximalportion and providing said first electrode along an underside of saiddistal portion with said substrate facing outwardly of said distalportion.